When I choose 1 to count by fives for some reason it also counts by ten. But when I choose 2 it only counts by tens. What do I need to change so that when I choose 1 it only counts by fives?

Here's the code:

#include <iostream>
#include <string>

using namespace std;
string name;

int main()
{
int choice, x, i;
cout << "Hello what is your name?" << endl;
cout << endl;
cin >> name;
cout << endl;
cout << "Hello " << name << endl;
cout << endl;
cout << "Would you like to play a counting game?" << endl;
cout << endl;
cout << "If you want to count by fives press 1." << endl;
cout << endl;
cout << "If you want to count by tens press 2." << endl;
cout << endl;

{
cin >> choice;
cout << endl;

if (choice == 1)
{
cout << "Okay we will count forward by fives." << endl;
cout << endl;
for (int i = 0; i <= 50; i += 5)
{
cout << i << " ";
}

}

else if (choice == 2)

cout << "Okay we will count forward by tens." << endl;
cout << endl;
for (int i = 0; i <= 50; i += 10)

{
cout << i << " ";
}
}

system ("pause");

return 0;
}